Hemo Quiz Flashcards
Who observed the circulatory system and predicted what and when did they do so?
William Harvey, capillaries, 1628
What does “hemo” mean in Greek?
Blood
The circulatory system is a system of
Arteries and veins
Arteries carry what
Oxygenated blood to the body
Where can you feel your pulse
Arteries
What is the structure of arteries
Thick muscular walls because the force of the blood is so great
Veins carry what
Deoxygenated blood from the body to the heart
How does the blood move
One direction, the muscles help to push the blood up to the brain
What is the structure of veins
Have thinner walls to help squeeze blood back to the heart
What is the structure of the heart
Four chambers, blood flows in one direction
At what rate does the heart pump blood
1 quart every ten seconds
The heart does more work than
All the muscles combined
What controls the speed in which the heart beats
Brain
Which nerve tells the heart to beat faster
Sympathetic nerve
Which nerve tells the heart to beat slower
Vagus nerve
How big are capillaries
Microscopic
How thick are capillaries
On cell thick
What gives off nutrients and oxygen
Capillaries
What does the capillary do
Takes away wastes and carbon dioxide
Cells are generally how far away from the capillaries
Two cells
How do red blood cells pass through
In single file
What controls the red blood cells
A gate keeper muscle called the sphincer
Barostat is
Pressure regulator in the neck that controls pressure in the brain
What regulates your heart rate
Hormones
Lungs do what
Take carbon dioxide out of the blood
What percent of sea water is the same as our blood
88%
